alleryStart learning →For a fixed amount of gas held at constant volume, pressure is directly proportional to which quantity?
AIts volume in litres
BIts mass in grams
CIts Celsius temperature
DIts kelvin temperature
Answer & Solution
Correct answer: D. Its kelvin temperature
1. Sealing a gas in a rigid container fixes both its volume and its number of moles.
2. Heating it then raises the pressure, and the two rise together in exact proportion.
3. The proportion only holds on the kelvin scale, because that scale starts at absolute zero.
4. On the Celsius scale the ratio fails at once, since a gas at 0 degrees C plainly does not exert zero pressure.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 9 "Gases", section 9.2 Relating Pressure, Volume, Amount, and Temperature: The Ideal Gas Law_
Keep practising Gases
Browse all Gases questions for IMU CET, or explore more Chemistry topics.
Related questions
The van der Waals equation reduces to PV = nRT under which condition?A 4.25 L flask holds 3.46 mol of carbon dioxide at 229 degrees C. What pressure does the iIn the van der Waals equation, what does the constant b account for?Who developed the first and simplest equation that improves on the ideal gas law?Under which conditions does a real gas behave most nearly like an ideal gas?For a gas showing perfectly ideal behaviour, the compressibility factor Z takes which valuKinetic molecular theory explains Boyle's law by which change when the volume of a gas decAt a fixed temperature, how do lighter gas molecules compare with heavier ones?